20221013 has 4 divisors (see below), whose sum is σ = 20505888. Its totient is φ = 19936140.

The previous prime is 20221009. The next prime is 20221027. The reversal of 20221013 is 31012202.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 20221013 - 2² = 20221009 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20220985 and 20221003.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20221213) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 142331 + ... + 142472.

It is an arithmetic number, because the mean of its divisors is an integer number (5126472).

Almost surely, 2^20221013 is an apocalyptic number.

It is an amenable number.

20221013 is a deficient number, since it is larger than the sum of its proper divisors (284875).

20221013 is an equidigital number, since it uses as much as digits as its factorization.

20221013 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 284874.

The product of its (nonzero) digits is 24, while the sum is 11.

The square root of 20221013 is about 4496.7780687955. The cubic root of 20221013 is about 272.4379703381.

Adding to 20221013 its reverse (31012202), we get a palindrome (51233215).

The spelling of 20221013 in words is "twenty million, two hundred twenty-one thousand, thirteen".